Successfully complete the game to unlock the "Big Heads" and "Infinite Ammo" cheats in the "Options" menu.

Prequel bonus

Have a saved game file from the original Army Of Two to unlock the AS-KRI and S0-Z Grand Pinger for purchase.

Bonus costumes

Successfully complete the game to unlock the Civilian, End, Light Armor, Mall, Medium Armor, and Old School costumes.

Start with fully upgraded weapons

Start a new game. Use the starting money to upgrade your weapons or buy new ones. Play the game until reaching the cutscene with the moral choice. Select the moral choice, then go to the main menu during the cutscene with the explosions. Select Campaign mode, and choose the one that was just played. Select "New", and you will have all the previously bought weapons, upgrades, and money from the previous mission. However, you can upgrade your weapons again. Repeat this process to fully upgrade and purchase all the starting weapons.

New areas

When entering a new area, take your time to explore it. There may be civilians around that you should protect or alternate paths that you and your partner can exploit.

Easy "Grenadier" trophy

At the first "Civilian" hostage spot in Chapter 1, tie down the three enemies, then throw a grenade in the middle of them to get the "Grenadier" trophy. Note: You will also kill the civilians with the grenade. Thus, restart from the checkpoint after getting the trophy.

Easy "Hate Monger" trophy

Upgrade a weapon until it has nearly a 100% aggro rating to get the "Hate Monger" trophy. Note: Style upgrades such as Jigsaw and Pimp will add a lot of aggro.

Easy "Pumpkin Patch" trophy

At the first "Civilian" hostage spot in Chapter 1, have your partner tie down the first enemy. The other two enemies will get on their knees, allowing you to shoot them both in the head with one bullet to get the "Pumpkin Patch" trophy. Note: Restart from the checkpoint after getting the trophy if desired.

Easy "Rock, Paper, Scissors" trophy

Press Triangle while not in combat and next to your partner to play rock, paper, scissors. Use the D-pad to select rock, paper, or scissors. Win three times in a row to get the "Rock, Paper, Scissors" trophy.